Motor-driving mechanism for moving-picture machines.



r N. POWER. MOTOR DRIVING MECHANISM FOR MOVING PICTURE MACHINES.

APPLICATION FILED MAR. I4, I9I3- 1,209,492 Patented Dec. 19,1916.

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MOTOR DRIVING MECHANISM FOR MOVING PICTURE MACHINES. APPLICATION FILED MAR. 14. 1913.

1 209,492. Patented Dec. 19, 1916.

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NICHOLAS POWER, on BROOKLYN, nw

COMPANY, on NEW YORK, N. Y.,

YORK, ASSIGNOR r NICHOLAS POWER A CORPORATION or DELAWARE.

MOTOR-DRIVING MECHANISM FOR MOVING-PICTURE MACHINES.

Specification of Application filed March 14,

i To all whom it may concern:

Be it known that I, NICHOLAS POWER, a citizen of the United States, and resident of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvementsv in Motor-Driving Mechanisms for Moving-Picture Machines, of which the following is a specification.

This invention relates to improvements in motor driving mechanisms for moving-picture machines and has for its object to provide a simple and eflicient driving mechanism especially adapted for combination with a moving picture machine in such 'a manner that it does not interfere with, or necessitate any alteration in said machine as constructed for the usual manual operation. l

A further object of the invention is to provide a driving mechanism Which is readily controlled by the operator standing in his usual position for operating the machine, to

" give any desired speed to the moving films,

supporting legs.

and to maintain such speed smoothly and uniformly.

Furtherobjects of the invention reside in the provision of variousimprovements in the details of construction and will be hereinafter described in connection with the accompanying drawings wherein I have illustrated a preferred embodiment of my invention in combination with a moving picture machine of modern design.

In the said drawings Figure 1 is a side elevation of the motor and driving connections and the adjacent portions of the'moving picture machine to which it is attached. Fig. 2 is an inverted plan view of the mech-' anism shown in Fig. 1. Fig. 3 is an end view from the right of Figs. 1 and 2; and Fig. 4 is a side elevation on a reduced scale showing the greater portion of the moving picture machine and the relation of the driving mechanism thereto.

Referring now to the drawings in which like characters indicate like parts throughout'the several views, 1 indicates the frame of the machine here shown as comprising a square metal frame having at its lower corners brackets 2 for the reception of the -The lower face of the square 1 is provided with suitable faces 3 against which is attached a bracketfi from Patented Dec 19, 1916.

1913. Serial No. 754,239.

Letters Patent.

which is suspended ,an electric motor 6 of usual construction having for its driving wheel a friction disk 7 whose driving face is engaged by the periphery of a leather tired wheel 8 mounted for adjustment transversely of the disk 7 to vary thespeed of rotation of the wheel. The wheel 8 is fast to its axle 9 which is rotatably supported on bearings at the lower ends of the spaced arms of a hanger 10 depending fronra cross rod 11 supported by an adjustable bracket pivotally secured at its rear end to the fixedbracket 5. The adjustable bracket comprises two side arms 13 spaced apart by an integral web 1% a distance greater than the width of the bracket 5 with the web 14 immediately under and adjacent the lower face of the bracket 5. For maintaining the bracket 12in its adjusted position I provide a pair' of adjusting screws 15 which pass freely through the web 14 and are threaded in the bracket 5 and a central adjusting screw 16 which is threaded in the web 14: and engages with its end the face of the bracket 5.

The bracket 12 is provided at one side with a depending ear 17 through which is threaded a set screw 18 engaging the rear face of one of the arms of the hanger 10 and provided with a suitable lock nut to hold it firmly in the adjusted position. Tension springs 19 are connected at the lower ends of the arms of the hanger 10 to fixed screws adjacent the upper face of the motor to hold the periphery of the wheel 8 in drlving contact i a pressure determined by the adjustment of the screw 18 as will be readily understood. The arms of the hangerlO are'pro-vided with horizontal extensions 20 on either side of the wheel 8 and slidingly mounted in the hearings in the ends of these arms is a rod 21 parallel with the shaft 9 of the wheel 8, screws 20 being provided to vary the fr1ction of the sliding movement of the rod.

with the face of the disk 7 with j the shaft, one of the arms is provided with a pin 24: operating in a hole in the adjacent Y arm 10- a pulley Wheel 30 which is conne ted arm 20 to maintain the two in parallelism.

The rod 21 is provided with suitable stop collars 25 for limiting the longitudinal movement of the rod and attached to one of these collars is a link 26 whose free end is pivotally connected to the lower end of the adjusting lever 27- fnlcrumed on the frame 1 in a convenient positionlfor, actuation by the operator as'more particularly shown in Fig. 4 of the drawing. The shaft 9 has attached to it at one end beyond the shafts of the projecting mechanism which I have indicated generally by the reference character 33. a

- The "'"operation of my improved motor driving mechanism will be clear from the above description. In a machine of this kind it is essential that the drive be eX- ceedingly smooth as the film which carries the pictures to be projected is fragile and liable to-be broken or damaged by any sudden stop or start of the machine. With my improved mechanism the pressure of the driving Wheel against the disk 7 can headjusted with the utmost nicety so that the friction surfaces will have the necessary adhesion for driving the film under normal conditions but will slip one on the other, in case of any *abnormalresistance or excessive driving impulse before the film can be damaged. Further, by means of the screws 15 and 16 thebracket 12 may be accurately adjusted to maintain the line of engagement of the wheel 8 and disk 7 exactly in line with the transverse diameter of the disk thereby obviating any angular strains on chine without stopping the motor. Another desirable feature is the provision vofthe screws 20' by which the friction "on the rod '21 can be adjusted to suit the personal 'lhis adjustment alsopermits the equation of the operator for obtaining the smoothest starting and stopping of the ma chine possible.

Having thus described my invention, what ll claim and desire to secure by Letters Patent is l. in a moving picture machine the combination of a substantially rectangular hollow frame with two vertical and two horizontal sides, a film magazine inclosed in said frame, a projecting apparatus mounted on the upper horizontal side of said frame, a driving motor suspended from the lower horizontal side of said frame, supporting legs at each corner of such side and con-- nected thereto above'the center of gravity of the motor, a variable speed gear having driving connection with said motor, also suspended from said frame, a driving --connection between said variable speed gear and said projecting apparatus, and means for adjusting said speed gear comprising a lever pivotally mounted on the vertical face of said frame.

2. ln a moving picture machine the com bination of a substantially rectangular hollow metal frame having a rigid base, a film magazine inclosed in said frame, a projecting apparatus supported on the-upper member of said frame and having a driving pulley projecting beyond the face of said magazine, an electric motor rigidly attached to and suspended from the base of said frame,

motor, also suspended from said frame, and having a driven pulley beyond the face of said magazine with a driving belt .connected with said pulleys. 1

- Signedat-NeW York in the county of New York and State of New York this 11th day of March D. 1913; I i

NICHOLAS POWER.

Witnessesi i A. W. GmBAR'r, v 'G. L. THOMAS. 

